// 引入mongoose模块
const mongoose = require("mongoose")

// 1. 连接mongo数据库系统，选择sh2104数据库
mongoose.connect('mongodb://127.0.0.1:27017/sh2104', {
    useNewUrlParser: true,
    useUnifiedTopology: true
});
// 2. 监听状态
mongoose.connection.on("connected",()=>{
    console.log("连接成功")
})
mongoose.connection.on("disconnected",()=>{
    console.log("连接断开")
})
mongoose.connection.on("error",()=>{
    console.log("连接失败")
})

// 3. 暴露mongoose对象
module.exports = mongoose;
